Fountain pen



June 23, 1931'. J. F. SCHWEIGE'R roux-run PEN I Filed April 20. 1929 R 3 Allan J me m & F k D J 3 S k mm ATTORNEYS.

Patented June 23, 1931 a Joint 1', mum or none, nmnliu 1011mm rm:

Application fled April 20, 1929. semi No. 856,657.

' The present invention relates to improve.- ments in. fountain pens and the primary object of the invention is to provide an improved construction for fountain pens em- ..bodying ink"feeding means for insurin an even flow of ink to the pen point regar ess" of the quantity of ink in tge ink container of the pen. s A further object of. the invention is to provide afountain pen wherein a barometric eed principle is employed for maintaining an even feeding of the ink regardless of the quantity :of in the ink container'of. the I pen. A further and important object of the inrigid materialsuch as glass, and whichcon tainers are readily insertable into the barrel .of the fountain pen as required from time to time and eliminates he numerous troubles incident to use of the collapsible rubber ink 1 sacks which deteriorate and contaminate the and require frequent filling since the same annot be filled to full capacity; Othr objects and advantages of the invention will be apparent during'thecourse of the following detailed description, taken 'in connection with the accompanying drawings forming a part of this specification and in which drawings: 7 Figure 1 is a central longitudinalsectifen thru the improved fountain pen. Figure 2 is a view-showing the ink container applied to the pen stock ready, for insertion-into the pen barrel.

' Figure 3 is an elevation of the refill ink container and showing the cap in position" for closing the mouth of the container prior toHuse.

Figure 4 is an enlarged fra 60 tudinal section on the line 4-4 of Figure].

gnientary" 'Figure 5 is a transverse section on line 5-5- of Figure 4.

In the drawings, and wherein similar reference characters designate corresponding parts' thruout the several views, the numeral G-designates the barrel of the pen preferably of cyhndrical formation being closed at its. rear end and having its front open end providediwith external screw threads 7 for threaded reception of the cap 8 =which.may be slipped over the rear tapering portion of the barrel. The cap 8 serves as a protection for the writing end of the pen when turned on the thread 7.

Removably and preferably slidably fit- 05 ting in the forward open end of the barrel 6 is a en stock 9 embodying a tubular sleeve portion 10 preferably provided intermediate its ends with anexternal shoulder 11 which abuts with the forward end of the barrel 6 .for limiting movement of the pen stock into the forward open end of e barrel, Fitting within and closing the forward portion of the sleeve 10 is a cylindrical head ortion 12 of a feed bar 13 provided at its orward end with any suitab e form of distributor 14 engaging the concaved side-of the en point 15". The feed bar head portion 12 is of special formation and has its flat inner end countor-bored to rovide a' relatively shallow cavity 15 having a flat bottom surface and an overhanging circumferential flange 16 providing) an undercut cavit at the inner I end oft e head portion. T. e flange 16 is provided with a way '17 which communicates with a feed duct 18 formed longitudinally in the external surface of the head 12 and communicating with the distributor 14 for feeding ink to the pen point 15.

, The ink container 20 'is preferably formed from glass or other suitable material and preferably constitutes the vessel in which the ink may be vended. The container is provided with a reduced neck portion 21 and prior to use of the container the neck is preferably closed by means of a suitable closure cap 22 fitting externally over the open end of the neck. The closure ca 22 extends a substantial distance over t e open endv of the container and is preferably provided with a knob for enabling ready and easy removal of the cap from the container when applying the container to the pen stock. The open end of the neck 21 is rovided with a suitable number of V-shape notches 24 forming ink control passages'when the container is applied to the 'pen stock.

Fitting within the rear portion of the tubular sleeve portion 10 is a suitable gasket 25 having an axial opening therethru for slidably and snugly receiving the reduced neck portion 21 of the ink container 20 for supporting the ink container co-axial with the pen stock within the barrel 6. When replacing the ink container, the pen stock is withdrawn from the barrel 6 and the full container of ink attached to the pen stock by inserting the neck 21 thru the opening in the gasket 25 until the straight end of the neck abuts with the fiat bottom surface of the undercut cavity 15 as clearly shown in sition, ink from the container will flow t ru the openings formed byithe notches 2 1 into the cavity 15, filling the same and then having passage thru the way 17 into the feed duct 18 for ready passage to the distributor for the pen point 15. After the cavity 15 becomes filled it will be seen that further feeding ofthe ink from thecontainer will be thru barometric action and thus maintain an even feeding of the ink regardless of the quantity of ink in the ink container. When the pen is not being used and with the pen point up, a portion of the ink recedes back into the ink container 20, except for a small quantity of ink which remains in the pocket formed between the head 12 and asket 25 and thus no ink is left in the eed duct 18 for thickening-and hardening beneath and about the pen point. The artial vacuum created by the barometric eed action tends to fully withdraw all ink from the feed duct 18. The ink however remain 'ing in the cavity 15 keeps thewalls therewet from the ink and thus allows ready movement of the ink to the feed duct 18. Thus it will be seen that when the pen is not in use with the pen point up, that the ink is withdrawn from the pen point and that when the pen is in a writing position with the pen point down that quick flow of ink to the ]pen point is insured.

While t e spacing between the inner end of the head portion 12 and gasket 25 may be varied, it has been found in .use that this spacing is governed by the size of the fountain pen in which the improved feed method is employed. In the larger size of fountain pens the gasket may be disposed in contact with the inner end of the head 12, while in smaller size fountain pens and for providing a larger pocket, the gasket should be spaced from the head 12.

With the novel arrangement shown employing a rigid ink container formed of glass or similar material, the ink may be vended in the containers and when placed in the pen, the refill will be the maxlmum amount of ink which may be contained in the pen at one time and yet this maximum quantity of ink will have no tendency to feed ink too freely to the en point.

From the fbregoing it will be a parent that an improved construction for ountain pens has been disclosed embodying features whereby full ink capacity of the pen is had by mere replacing of filled containers preferably forming the vessels in which the ink is vended, and which pen employs a bar-' ometric feed principle for maintaining an even feed of the ink regardless of the quantity of ink in the container. It will also be apparent that a novel arrangement has been disclosed wherein quick feeding of the ink to the en point is insured when the pen is inverted for use.

Changes in detail may be made to the form of invention herein shown and described, without departing from the spirit of the invention or the scope of the following claims.

I claim:

1. A fountain pen comprising a barrel, a pen stock removably fitting in one end of the barrel and having an ink pocket and a feed duct communicating with the pocket, and a noncollapsible ink container supported at one end in the pen stock with its open end extending into said pocket into abutting engagement with one wall thereof, said open end of the container being notched in its side to provide communication between the container and ink pocket.

2. In a fountain pen, a barrel, a pen stock removably insertable into one end of the barrel including a head portion having a cavity at its inner end and a feed duct communicating with the cavity,and an ink container supported by the inner end of the pen stock with its open end seatin upon the base surface of the cavity, sai openend of the container being notched to provide communicating openings from the container into the cavity.

3. In a fountain pen, a barrel, a pen stock removably fitting in one end of the barrel including a head ortion having a counterbored cavity at its lnner end provided with a flat bottom surface and a feed duct commu- I nicating with a cavity, a gasket inwardly of the cavity, and an ink container supported at one end in the gasket with its open end seated upon the flat bottom surface of the cavity andhaving ajnotched end edge.

4. In a fountain pen, a barrel, a pen stock removably fitting in one end of the barrel including a feed bar embodying a head portion ha'vlng a counter-bore at its innerend forming an undercut cavity having a flat bottom surface and an overhanging circumferential flange, the flange having an opening ccmmunicating with the inner end of a feed duct, a gasket arranged in the pen stock inwardly of the undercut cavity, and a rigid ink container having .a notched open end,

removably insertable thru the gasket with. 1 the edge of its open endseating upon the flat bottom surface of the cavity.

5. In a fountain pen, 'a barrel, a removv able pen stock including a tubular sleeve portion for limited insertion into one end of the barrel, a feed bar including a head portion fitting in the outer end of the sleeve and having an undercut cavity at its'inner end provided with a flat bottom surface and a feed passageway opening into the cavity, a gasket arranged in the inner end of the sleeve forming a closed pocket at the inner end of the feed bar, and a non-collapsible ink container having a straight cut open end insertable thru the gasket into seating rela- I tion upon 'the fiat bottom surface of the cavity, said contalner being notched at its open end edge. a

6. In a fountain pen, a barrel, a removable I pen stock including a tubular sleeve ortion or limited insertion into one end of t e barrel, a feed bar includin a head portion fitting in the outer end 0 the sleeve and having an undercut cavity at its inner end provided with a flatbottom surface-and a eed passageway openin into the cavity, a tubular. gasket removab y insertable into the inner end of the sleeve over the cavity, and a e rigid ink container having a straightrut open end insertable thru the gasket 1nto seating relation upon the flat bottom sur-" face of the cavity, said container being notched at its ,0 en end ed e. OHN CHWEIGER 

